Bump actions/cache from 5 to 6

Bumps [actions/cache](https://github.com/actions/cache) from 5 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/end-to-end.yml

@@ -25,7 +25,7 @@ jobs:
         shell: Rscript {0}
 
       - name: Cache R packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}

.github/workflows/hook-tests.yaml

@@ -34,21 +34,21 @@ jobs:
         shell: Rscript {0}
       - name: Cache R packages (macOs)
         if: startsWith(runner.os, 'macOS')
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/Library/Application Support/renv
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('renv.lock') }}
           restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
       - name: Cache R packages (Linux)
         if: startsWith(runner.os, 'Linux')
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.local/share/renv
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('renv.lock') }}
           restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
       - name: Cache R packages (Windows)
         if: startsWith(runner.os, 'Windows')
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~\AppData\Local\renv
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('renv.lock') }}